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42S183D
SERIES 8116/8118 16-/18-METER EARTH STATION ANTENNA
6-1
SECTION 6 MAINTENANCE
The Series 16M/18M-Meter Earth Station Antenna is designed for
use in many different environmental conditions with minimum
maintenance requirements. Several areas on the antenna require
service at various intervals to ensure the proper use and operation.
Modification to the suggested service intervals is expected pending
customer operation and environmental conditions. The azimuth
and elevation actuators contain a gearbox or reducer and a machine
screw or ball screw mechanism which require inspection and
application of lubricant as required. Structural fasteners used on
the mount, actuators, reflector, and feed may require additional
corrosion protection.
GENERAL
CAUTION
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The backlash and bearing preload on azimuth
and elevation machine screw assemblies are
factory set on a test fixture to exact standards.
To maintain proper adjustment, the assemblies
have been keyed in place to prevent rotation. Do
not attempt to adjust these parameters. Any
questions concerning this should be directed to
ViaSat Inc.
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The suggested service intervals apply to a typical antenna
installation and may vary due to environmental conditions.
PERIODIC
MAINTENANCE
Ensure antennas are driven in azimuth and elevation on a weekly
basis. In areas of heavy snow and ice, mounts should be inspected
before movement for excessive accumulation of ice, or damage
may result.
Weekly Maintenance
Apply electrical power, as necessary, to azimuth actuator, elevation
actuator, and polarization drive assembly (if applicable). Run each
axis for two or three minutes in the normal operating sector. If a
pressurization system is installed, check pressure of feed and
transmit waveguide. Service as required.
Monthly Maintenance
